Nozzle construction

ABSTRACT

A top air nozzle for blowing water off a washed moving vehicle in a car wash comprises a unit nozzle housing of molded plastic material having an arcuate top wall, laterally diverging side walls, a pair of laterally spaced mount blocks, an upright rear wall, an upper front wall portion inclined downwardly and outwardly of the rear wall and terminating in a lower front wall portion inclined downwardly and inwardly toward the rear wall. The walls and wall portions defined an air chamber of laterally increasing width from its top with the rear wall, lower front wall portion and side walls defining a laterally elongated throated air outlet. A plurality of spaced threaded insert fasteners arranged in a circle are molded, interlocked and enclosed within one of the upper front wall portion and rear wall. A plurality of spaced fasteners are arranged in a row, are molded, interlocked and enclosed within each mount block. The wall or wall portion mounting the first fasteners is adapted to have an opening cut therein inwardly of the fasteners to receive a pressurized air inlet.

FIELD OF THE INVENTION

The present invention relates to a nozzle construction or air nozzle andmore particularly to a unit nozzle housing of molded plastic materialhaving an air chamber at one end terminating in a throated outlet and atits other end an inlet adapted to receive a pressurized air hose.

BACKGROUND OF THE INVENTION

Previously air nozzle housings having a throated outlet have been formedof metal. Attached to the housing was a separate inlet fittingconnectable to an air hose. Due to interrupted wall interiors, interiorconstructions including fasteners, the flow of air under pressurethrough the outlet has been turbulent, noisy and inefficient.

There have been difficulties in securing and retaining a flexible airhose over the inlet of the nozzle housing. There have also beendifficulties in mounting an air inlet upon and around an opening in theair nozzle housing and in efficiently securing the air inlet in positionthereon.

Problems have also been encountered in adjustably supporting a top airnozzle on a framework transverse of the path of movement of a washedvehicle moving thereunder in a car wash. There have been difficulties inadjusting the angle of tilt or attack of a nozzle for an efficientblowing of water off of the washed vehicle. Previously air nozzlehousings have engaged and scratched the body of a moving vehicle due tothe difficulty of elevating the air nozzle housing to a vehicleclearance position as the vehicle passes thereunder.

SUMMARY OF THE INVENTION

An important feature of the present invention is to provide a top airnozzle adapted for blowing water off a washed moving vehicle in a carwash comprising a unit nozzle housing of molded plastic material whichincludes an arcuate top wall, laterally diverging side walls, a pair oflaterally spaced mount blocks, a substantially upright rear wall, anupper front wall portion inclined downwardly and outwardly of the rearwall and a lower front wall portion inclined downwardly and inwardlytoward the rear wall. The walls and wall portions define an air chamberof laterally increasing width from its top. The side walls, the lowerwall portion and rear wall define a laterally elongated throated airoutlet.

Another feature is to provide a unit nozzle housing of molded plasticmaterial and within one of the top wall portion and rear wall there areselectively molded and retained in a circle a series of spaced insertfasteners enclosed therein.

Still another feature is to provide within the mold used in making thehousing a series of additional insert fasteners arranged in rows whichin the unit molded article are mounted, enclosed and secured within themount blocks of the nozzle housing and enclosed therein. This providesan effective means for mounting and supporting the unit nozzle housingupon a frame work.

Another feature, after the housing is removed from the mold, is to cut acircular inlet opening within the wall or wall portion containing theseries of spaced fasteners arranged in a circle, and inwardly thereofwith the opening communicating with the internal chamber of the nozzlehousing. An air inlet surrounds the inlet opening and is secured to thewall or wall portion.

A further feature is to provide an air inlet sleeve having an aperturedannular mount flange which overlies and is secured to one of the upperfront wall portion and rear wall around the opening cut therein adaptedto receive a flexible hose connected to a pressurized air source.

A still further feature includes an annular bead adjacent one end of theair inlet. An elongated flexible hose of corrugated form at one endsnugly overlies the inlet, is interlocked with the bead against relativelongitudinal movement and is clamped thereon.

Another feature is to provide a unit nozzle housing an improved clampmeans which extends around and compressively engages the hose and theinlet for securing the hose over the inlet for delivery of pressurizedair into the chamber within the nozzle housing.

It is still another feature to provide a pair of laterally spaced clampstraps apertured at their one ends to receive fasteners for securing tothe mount block fasteners of the nozzle housing, with the other ends ofthe clamp straps connected to a transverse vertical lift rod. The topair nozzle and unit nozzle housing is mounted upon a framework forpositioning transversely of the path of movement of a washed vehiclemoving thereunder. The nozzle housing is adapted for angular adjustmentof the angle of attack of pressurized air streams delivered through itsthroated air outlet. It is further adapted for vertical adjustments forclearance with respect to the washed vehicle passing thereunder.

Another important feature is to provide a vertical support means for therod which supports the top unit nozzle housing which is capable ofrotary adjustment and vertical adjustment with respect to a frame work.

It is still another feature to provide along and depending from thethroated outlet of the unit nozzle housing an elongated air directionalflap of resilient material which depends below the throated outlet fordirecting pressurized air against the direction of movement of a washedvehicle moving thereunder.

Another important feature is to provide upon the outwardly divergingside walls of the housing towards the lower ends thereof a pair ofoutwardly and downwardly inclined hooded outlets in communication withthe interior air chamber of the nozzle housing adapted to feed streamsof pressurized air in a pattern laterally outward of the air stream fromthe elongated throated outlet of the housing for blowing air onto awashed vehicle which is wider than some vehicles thereby increasing thelateral air pattern of the nozzle.

It is still another feature of the present invention to provide inconjunction with the respective walls which define the unit nozzlehousing interior radiused corners and smooth blending convexedembossments upon the interior walls overlying the respective moldedinsert fasteners to assure a smooth, nonturbulent efficient air flowpassing through the nozzle housing and through the throated outlet andlateral outlets therein.

A further important feature of the invention is the method of making aunit air nozzle housing of molded plastic material having a laterallyelongated throated air outlet which comprises the steps: (a) of taking atwo piece mold which when closed has an internal cavity corresponding tothe outer configuration of the unit nozzle housing; (b) placing powderedor granular plastic in the cavity of the open mold in an amountsufficient to form the air nozzle housing; (c) closing the mold andbolting it together; (d) moving the closed mold into a heated oven whilerotationally rotating the mold to melt the plastic and thereby fill thecavity with liquid plastic material and to form the unit nozzle housingwith an elongated throated air outlet; (e) removing the heated mold fromthe oven and permitting the mold to cool either by air or by water tosolidify the nozzle housing; and (f) removing the solidified plastichousing from the mold.

Still another feature includes the step of inserting into the mold priorto its rotation a plurality of spaced insert fasteners whereby thefasteners are permanently embedded, enclosed within and anchoredselectively within one of the front wall portion and rear wall of theunit molded housing and within the mount blocks thereon.

A further feature of the present method includes a step of selectivelymolding the fasteners into one of the walls of the molded housing andafter removing the housing from the mold, cutting a circular openingthrough the wall containing the fasteners and inwardly thereof.

These and other objects and features will be seen from the followingspecification and claims in conjunction with the appended drawings.

THE DRAWINGS

FIG. 1 is a top plan view of the present unit nozzle housing taken inthe direction of arrows 1--1 of FIG. 2.

FIG. 2 is a front elevational view thereof.

FIG. 3 is a section taken in the direction of arrows 3--3 of FIG. 2.

FIG. 4 is a bottom perspective view of the unit nozzle housing shown inFIGS. 1 and 2.

FIG. 5 is a transverse section taken in the direction of arrows 5--5 ofFIG. 2, on an enlarged scale.

FIG. 6 is a fragmentary plan section taken in the direction of arrows6--6 of FIG. 2, on an enlarged scale.

FIG. 7 is a fragmentary section taken in the direction of arrows 7--7 ofFIG. 2, on an increased scale, with an air hose fragmentarily shown.

It will be understood that the above drawings illustrate merely apreferred embodiment of the invention, and that other embodiments arecontemplated within the scope of the claims hereafter set forth.

DETAILED DESCRIPTION OF AN EMBODIMENT OF THE INVENTION

Referring to the drawings, a top air nozzle assembly or nozzleconstruction is generally indicated at 11 in one embodiment of theinvention adapted for blowing water off of a washed moving vehicle in acar wash for illustration. The top air nozzle includes a unit nozzlehousing 13 of molded plastic material as for example, a high molecularweight polyethylene which is rotationally molded within a mold toproduce the unit molded nozzel shown in FIGS. 1, 2 and 4. The presentunit molded nozzle housing 13 includes an arcuate top wall 15, laterallydivergent side walls 17 and intermediate right angular mount blocks 19provided with side faces 21.

The unit molded nozzle housing 13 further includes upper front wallportion 23 which is inclined downwardly and outwardly at a 30° angle,approximately, with respect to the generally upright rear wall 27. Upperfront wall portion 23 terminates in the lower front wall portion 25which is inclined downwardly and inwardly towards rear wall 27 at anangle of 30°, approximately, with the rear wall 27 at its lower endconverging inwardly at 29, FIG. 3. The nozzle housing 13 has a thicknessof 3/8", approximately.

The respective top wall 15, side walls 17, front wall portions 23 and25, rear wall 27 and rear wall converging portion 29 define an airchamber 33 which terminates in the laterally elongated throated airoutlet or orifice 43. As shown in FIG. 2, air chamber 33 divergeslaterally from top to bottom and converges downwardly terminating in thelaterally elongated throated air outlet 43. In view of the inclinationof the respective upper front wall portion 23 and lower front wallportion 25 corresponding portions of the divergent side walls 17, FIG.1, are laterally enlarged at 31 or tapered outwardly to match thetapered front wall portions 23, 25.

Mounted upon the respective diverging side walls 17 adjacent their lowerends are the opposed outwardly inclined hoods 35 which are downwardlyconverging at 37, FIG. 1, and include corresponding side walls 39 todefine a pair of throated pressure air outlets 41 which are incommunication with air chamber 33.

The respective outlets 41 and the laterally elongated air outlet 43 areinitially molded closed when removed from the rotational mold and arethereafter cut or routed out to define corresponding air outlets ororifices 41 in hoods 35 and the laterally elongated air outlet 43 at thelower end of the unit molded nozzle housing 13.

In the illustrative embodiment, a plurality of spaced insert fasteners45 are arranged in a circle in the rotational mold before molding of theunit nozzle housing 13. When the molded unit nozzle housing 13 isremoved from the mold the corresponding insert fasteners 45 are nested,enclosed and anchored within the corresponding wall as for example,front wall portion 23. Selectively the fasteners 45 may be molded intothe rear wall, as shown in dash lines, when the inlet 59 is to bemounted thereon.

The fasteners 45 are of polygonal shape such as hexagonal at 47, FIG. 6,and in the molded article are relatively non-rotatable with respect tothe unit nozzle housing 13 within which they are enclosed. Therespective fasteners 45 have an annular recess 49 intermediate theirends to thereby provide within the molded article a plastic interlock at51 which secures the fasteners 45 against relative longitudinal movementwith respect to the unit molded housing 13. In the illustrativeembodiment, outer end portions of the corresponding fasteners 45 areflush with the corresponding outer wall or wall portion of a housing asat 53.

Upon the interior surface portion of the wall within which the fastenersare enclosed, as for example the upper wall portion 23, corresponding tothe respective fasteners 45 there are smooth convex interior embossments55 which blend with the interior wall surface of the wall or wallportion. The embossments 55 in cooperation with the interior radiusedcorners 22, FIG. 3, between the respective interior walls and wallportions provide for an efficient noiseless flow of pressurized airwithout turbulence from air chamber 33 and out through the elongatedthroated outlet 43 and the corresponding hooded outlets 41, FIGS. 2 and3. In the illustrative embodiment the unit molded housing 13 of FIGS. 3and 5 is arranged transversely of the direction of movement of a vehiclebeing washed within a car wash, not shown, yet schematically indicatedby the arrow in FIG. 5. The nozzle housing 13 is in the path of theforward end of the vehicle.

The present unit nozzle housing 13 is also in use positioned adjacentthe rear portion of the vehicle, and may be at a different angle attackrelative to the vehicle as it moves away from such second unit nozzlehousing. It may be desired to mount air inlet 59 upon rear wall 27, asshown in dash lines FIG. 3.

In the illustrative embodiment, FIG. 3, after the molded article hasbeen removed from the rotational mold an air inlet opening 57 is routedor cut out of front wall portion 23 inwardly of the corresponding insertfasteners 45 provided in that wall. Conversely and selectively in theevent that the spaced fasteners 45 are molded within the rear wall 27the fasteners will be molded and retained within such rear wall andenclosed by interior embossments 55 shown in dash lines. The circularopening 57 would then be cut in the rear wall 27 inwardly of the circleof fasteners 45.

Air inlet sleeve 59 has at one end an annular bead 61 and at itsopposite end an apertured circular mount flange 63 which is positionableover upper front wall portion 23 in registery with embedded fasteners 45and with a suitable gasket 65 of flexible material, FIG. 7, interposedtherebetween and secured in position by a plurality of fasteners 67. Alock washer 68 is provided between each fastener 67 and the flange 63.

In the illustrative embodiment, air inlet 59 is adapted to receivethereover corrugated flexible hose 69, fragmentarily shown in FIG. 7,preferably constructed of urethane or other suitable plastic materialincluding a reinforcing wire 71 within corresponding spiral corrugations69. The corrugated flexible hose 69 is positioned over and interlockedwith annular bead 61 upon inlet 59 and is further anchored and securedupon the inlet by a clamp assembly 73.

The clamp assembly 73 includes an elongated flexible channel 75 whichfits over one of the annular corrugations of hose 69 and a portion of anadjacent corrugation. The respective ends of the channel 75 arelaterally overlapped.

A pair of the clamp straps 77, one of which is shown in FIG. 7, looselyoverlie the respective overlapped ends of channel 75 and arerespectively affixed as by welding to adjacent intermediate portions ofthe channel of each of the overlapped ends. Each of the clamp strapsincludes a loop portion 79. T-shaped fasteners 81 interconnect the clampstraps 77 and when tightened by a fastener, draw up the adjacentintermediate portions of the clamp channel and extend the overlap of therespective ends for snugly anchoring flexible hose 69 over inlet 59.

Referring to FIGS. 2 and 6 in the rotational molding of thecorresponding fasteners 45 within the unit molded nozzle housing 13there will be a series of fasteners 45 arranged in a row, nested,retained and enclosed within the corresponding mount blocks 19, flushwith the corresponding side faces 21 thereof.

A pair of laterally spaced generally upright clamp straps 83 have aseries of transverse apertures at one end adapted to receive fasteners67 which project into the mount block fasteners 45. Upper ends of straps83 are recessed at 85, FIG. 3, extend over undersurface portions oftransverse vertical lift rod 87 and are suitably secured thereto bywelds 89. FIG. 2 illustrates an efficient and effective means ofsupporting and suspending the unit nozzle housing 13 in a transverseposition relative to the path of movement of a washed vehicle movingthereunder as shown in FIG. 5.

In normal operation the present unit nozzle housing 13 is adapted fordirecting streams of pressurized air through the laterally elongatedthroated air outlet 43 and through the lateral outlets 41, FIGS. 2 and3. It is desirable that housing 13 be inclined toward the moving vehicleat an appropriate angle of attack with respect to movement of thevehicle, as for example, 30° for respect to a normal.

For this purpose, the vertical lift rod 87, fragmentarily shown, in FIG.2 is rotatively mounted at its ends within the vertically adjustablesupport means or sleeves 90 upon upright rails 92, fragmentarily shown,as a part of the framework. By this construction, and as shown at 88vertical lift rod 87 is adapted for limited rotary adjustments fordetermining the angle of attack or inclination of unit nozzle housing 13relative to the vehicle moving thereunder.

The vertical adjustment of the support means 90 provides a means bywhich the vertical lift rod 87 may be vertically adjusted by remotecontrol so that the unit nozzle housing 13 at all times overlies thevehicle moving thereunder and remains out of contact therewith whileclosely adjacent thereto.

The present top air nozzle assembly 13 including the unit nozzle housing13 is adapted for pivotal angular movements up to 30° from an uprightposition approximately. At the same time the corresponding vertical liftrod is adapted for vertical adjustments for affecting correspondingvertical adjustments of the unit nozzle housing.

As shown in FIGS. 2, 3 and 5 the throated air orifice or outlet 43 isdefined by a pair opposed transversely apertured wall elements 91 at thelower ends of the corresponding front wall portion 25 and rear wall 29.An elongated flap 93 of rubber or other flexible material, such as asuitable plastic material is suitably apertured, and depends from one ofthe wall elements 91, such as the wall element furthest away from thevehicle moving in the direction designated by the arrow in FIG. 5.

A series of laterally spaced spacers 95, FIGS. 4 and 5, are interposedbetween the corresponding wall elements 91 which define the throatedoutlet 43. A corresponding plurality of flat head bolt fasteners 97project through apertures in wall elements 91, through spacers 95 andare suitably secured to flap 93 with suitable washers 99 interposed. Theflap 93 depends in a substantially upright position. In operation of thepresent unit nozzle housing 13 directing pressurized air through thelaterally elongated throated outlet 43, the rubber flap 93 functions topartly deflect the downwardly moving air towards the oncoming washedvehicle moving thereunder, FIG. 5.

In the illustrative embodiment, FIG. 3, front wall portion 23 isinclined at approximately 30° with respect to rear wall 27 so that theincluded angle between these walls is approximately 30°. Pressurized airis directed through air inlet 59 shown in solid lines, or selectivelythrough the other air inlet shown in dash lines.

Similarly, the lower front wall portion 25 and corresponding rear wall27 including rear wall element 29 are similarly inclined toward eachother at an angle of approximately 30°, more or less, for increasedvelocity of flow of pressurized air through and along the transverselyelongated orifice or air outlet 43. Additional pressurized air is jettedthrough the laterally arranged hood outlets 41 for blowing water offvehicles of increased width moving thereunder.

The present invention is primarily directed to a top air nozzleconstruction including a unit nozzle housing 13 of molded plasticmaterial such as shown in FIGS. 1-7. The invention is furthermoredirected to a method of molding the present top air nozzle whichcomprises the following steps:

(a) taking a two piece mold which when closed has an internal cavitycorresponding to the outer configuration of the unit nozzle housing;

(b) placing powdered or granular plastic in the cavity of the open moldin an amount sufficient to form the unit nozzle housing;

(c) closing the mold and bolting it together;

(d) moving the closed mold into a heated oven while rotationallyrotating the mold to melt the plastic and distribute and fill the cavitywith liquid plastic material and to thereby form the unit nozzle housingwith the laterally elongated throated air outlet;

(e) removing the heated mold from the oven and permitting the mold tocoole either by air or by water to solidify the plastic nozzle housing;and

(f) removing the solified plastic nozzle housing from the mold.

The method includes the further step of inserting into the mold prior toclosing and rotation a plurality of spaced insert fastener 45 wherebythe fasteners are permanently embedded, enclosed selectively within oneof the upper front wall portion and rear wall of the unit moldedhousing, and within the mount blocks provided thereon. outlets 41 forblowing water off vehicles of increased width moving thereunder.

The present invention is primarily directed to a top air nozzleconstruction including a unit nozzle housing 13 of molded plasticmaterial such as shown in FIGS. 1-7. The invention is furthermoredirected to a method of molding the present top air nozzle whichcomprises the following steps:

(a) taking a two piece mold which when closed has an internal cavitycorresponding to the outer configuration of the unit nozzle housing;

(b) placing powdered or granular plastic in the cavity of the open moldin an amount sufficient to form the unit nozzle housing;

(c) closing the mold and bolting it together;

(d) moving the closed mold into a heated oven while rotationallyrotating the mold to melt the plastic and distribute and fill the cavitywith liquid plastic material and to thereby form the unit nozzle housingwith the laterally elongated throated air outlet;

(e) removing the heated mold from the oven and permitting the mold tocool either by air or by water to solidify the plastic nozzle housing;and

(f) removing the solified plastic nozzle housing from the mold.

The method includes the further step of inserting into the mold prior toclosing and rotation a plurality of spaced insert fastener 45 wherebythe fasteners are permanently embedded, enclosed selectively within oneof the upper front wall portion and rear wall of the unit moldedhousing, and within the mount blocks provided thereon.

In the method defined herein fasteners 45 are arranged in a circle andthere is the further step of:

(a) removing the housing from the mold and then routing a circularopening 57 in one of the walls of the housing corresponding to the wallwithin which the fasteners 45 are anchored, inwardly of the fastenersproviding an air inlet opening. The mount flange of pressure air inlet59 adapted to receive flexible air conduit 69 is mounted upon the wallin communication with opening 57.

The method include others steps after the nozzle housing is removed fromthe mold including:

(a) cutting an elongated opening in the normally closed throated airoutlet 43; and

(b) cutting the elongated openings in the normally closed air outlets 41located in the inclined hoods 35.

In the illustrative embodiment the preferred plastic material is a highmolecular weight polyethylene which has high lubricity despite the factthat it will cold flow. Any suitable plastic material may be employedwhich is tough in resistance to damage, impervious to temperaturechanges, inexpensive, impervious to mold chemicals including cleaningagents and easy to keep clean, durable and long lasting. The presentmethod and mold construction provides for consistent velocity at theends of the corresponding nozzles 43 and 41 providing a smoothuninterrupted flow of pressurized air at uniform velocity andsubstantially noiseless.

Having described our invention, reference should now be had to thefollowing claims:

We claim:
 1. An air nozzle adapted for blowing water off a washedvehicle in a car wash comprising a unit nozzle housing of molded plasticmaterial having a top wall, laterally diverging side walls, asubstantially upright rear wall, an upper front wall portion inclineddownwardly and outwardly of said rear wall, a lower front wall portioninclined downwardly and inwardly toward said rear wall, said walls andwall portions defining an air chamber of laterally increasing width fromits top and with said side walls, said lower front wall portion and rearwall defining a laterally elongated throated air outlet, one of saidupper front wall portion and rear wall having an air inlet openingtherein, and an outwardly and laterally inclined downwardly converginghood upon each side wall communicating with said air chamber andterminating in an air outlet orifice for directing air laterally outwardof said throated outlet and adapted for blowing water off the edges of awider vehicle.
 2. In the air nozzle of claim 1, the molded plasticmaterial of said nozzle housing being a high molecular weightpolyethylene.
 3. In the air nozzle of claim 1, and an air inlet sleevesurrounding said air inlet opening having an apertured annular mountflange overlying and secured to said one of said upper front wallportion and rear wall adapted to receive one end of a hose connected toa source of air.
 4. In the air nozzle of claim 3, said upper front wallportion having said air inlet opening cut therein.
 5. In the air nozzleof claim 1, an annular bead adjacent one end of said air inletopening;an elongated flexible hose of corrugated form at one end snuglyoverlying said inlet opening and interlocked with said bead againstrelative longitudinal movement; and an adjustable clamp means extendingaround and compressibly engaging said hose and inlet.
 6. An air nozzleadapted for blowing water off a washed vehicle in a car wash comprisinga unit nozzle housing of molded plastic material having a top wall,laterally diverging side walls, a substantially upright rear wall, anupper front wall portion inclined downwardly and outwardly of said rearwall, a lower front wall portion inclined downwardly and inwardly towardsaid rear wall, said walls and wall portions defining an air chamber oflaterally increasing width from its top and with said side walls, saidlower front wall portion and rear wall defining a laterally elongatedthroated air outlet, and a plurality of spaced threaded insert fastenersarranged in a circle molded, interlocked and non-rotatively enclosedselectively within one of said upper front wall portion and rear wall.7. An air nozzle adapted for blowing water off a washed vehicle in a carwash comprising a unit nozzle housing of molded plastic material havinga top wall, laterally diverging side walls, a pair of laterally spacedmount blocks, a substantially upright rear wall, an upper front wallportion inclined downwardly and outwardly of said rear wall, a lowerfront wall portion inclined downwardly and inwardly toward said rearwall, said walls and wall portions defining an air chamber of laterallyincreasing width from its top and with said side walls, said lower frontwall portion and rear wall defining a laterally elongated throated airoutlet, and a plurality of spaced threaded insert fasteners arranged ina row molded, interlocked and non-rotatively enclosed within each ofsaid mount blocks.
 8. An air nozzle adapted for blowing water off awashed vehicle in a car wash comprising a unit nozzle housing of moldedplastic material having a top wall, laterally diverging side walls, asubstantially upright rear wall, an upper front wall portion inclineddownwardly and outwardly of said rear wall, a lower front wall portioninclined downwardly and inwardly toward said rear wall, said walls andwall portions defining an air chamber of laterally increasing width fromits top and with said side walls, said lower front wall portion and rearwall defining a laterally elongated throated air outlet, and a pluralityof spaced threaded insert fasteners arranged in a circle molded,interlocked and non-rotatively enclosed with said upper front wallportion.
 9. In the air nozzle of claim 6, said housing having a pair oflaterally spaced mount blocks, anda plurality of spaced threaded insertfasteners arranged in a row molded, interlocked and nonrotativelyenclosed within each of said mount blocks.
 10. In the air nozzle ofclaim 6, there being an air inlet opening cut into said one of saidupper front wall portion and rear wall inwardly of said insertfasteners; andan air inlet sleeve surrounding said opening having anapertured annular mount flange overlying said insert fasteners andsecured thereto, adapted to receive one end of a flexible hose connectedto a pressurized air source.
 11. In the air nozzle of claim 10, and aplurality of spaced threaded insert fasteners arranged in a row molded,interlocked and nonrotatively enclosed within each of said mount bodies.12. In the air nozzle of claim 8, there being an air inlet opening cutinto said upper front wall portion inwardly of said insert fasteners;andan air inlet sleeve having an apertured annular mount flangeoverlying said insert fasteners and secured thereto, adapted to receiveone end of a flexible hose connected to a pressurized air source.
 13. Inthe air nozzle of claim 7, said mount blocks being arranged between saidtop and side walls respectively.
 14. In the air nozzle of claim 6, saidupper front wall portion being inclined at an angle of 30°,approximately, to said rear wall.
 15. In the air nozzle of claim 6, saidlower front wall portion being inclined at an angle of 30°,approximately, to said rear wall.
 16. In the air nozzle of claim 14,said lower front wall portion being inclined at an angle of 30°,approximately, to said rear wall.
 17. In the air nozzle of claim 3, andan apertured gasket interposed between said mount flange and adjacentwall.
 18. In the air nozzle of claim 6, said housing and insertfasteners being rotationally molded within said fasteners permanentlyembedded and enclosed within one of said upper front wall portion andrear wall, and anchored against relative longitudinal and rotationalmovements.
 19. In the air nozzle of claim 7, said housing and insertfasteners being rotationally molded with said fasteners permanentlyembedded and enclosed within said one of said upper front wall portionand rear wall and within said mount blocks and enclosed against relativelongitudinal and rotational movements.
 20. An air nozzle adapted forblowing water off a washed vehicle in a car wash comprising a unitnozzle housing of molded plastic material having a top wall, laterallydiverging side walls, a pair of laterally spaced mount blocks, asubstantially upright rear wall, an upper front wall portion inclineddownwardly and outwardly of said rear wall, a lower front wall portioninclined downwardly and inwardly toward said rear wall, said walls andwall portions defining an air chamber of laterally increasing width fromits top and with said side walls, said lower front wall portion and rearwall defining a laterally elongated throated air outlet, one of saidupper front wall portion and rear wall having a pressurized air inletopening cut therein, an air inlet sleeve surrounding said opening havingan apertured annular mount flange overlying and secured to said one ofsaid upper front wall portion and rear wall adapted to receive one endof a flexible hose connected to a pressurized air source, an annularbead adjacent one end of said air inlet, an elongated flexible hose ofcorrugated form at one end snugly overlying said inlet and interlockedwith said bead against relative longitudinal movement, an adjustableclamp means extending around and compressibly engaging said hose andinlet, said clamp means including a flexible metal channel overlying thecorrugations of said hose, with opposite ends of said channel laterallyoverlapped, a looped anchor strip overlying the respective oppositeoverlapped ends and adjacent intermediate portions of said channel andsecured to an adjacent intermediate portion, and an adjustable fasteningmeans interconnecting said anchor strips for variably drawing up saidintermediate portions extending the overlap of said channel ends.
 21. Inthe air nozzle of claim 9, said insert fasteners being polygonal inshape, and having an annular groove intermediate their ends to receiveplastic material to provide an interlock with said housing againstrelative longitudinal and rotative movement.
 22. In the air nozzle ofclaim 7, a horizontally disposed lift rod upon a support means;a pair oflaterally spaced clamp straps secured to and depending from said liftrod, at their one ends apertured and in registry with said mount blocks;and a plurality of fasteners extending through said straps and into saidmount block insert fasteners.
 23. In the air nozzle of claim 22, saidlift rod being adapted for vertical adjustments for effectingcorresponding vertical adjustments of said nozzle housing as a vehiclemoves thereunder to follow the contour of the vehicle and avoid contacttherewith.
 24. In the air nozzle of claim 22, said vertical lift rodbeing adapted for limited rotary adjustment for effecting correspondingangular adjustment of said nozzle housing and the angle of attachment ofsaid throated air outlet relative to the vehicle.
 25. In the air nozzleof claim 6, said housing and insert fasteners being rotationally moldedwith said fasteners permanently embedded and enclosed within said one ofsaid upper front wall portion and rear wall, the interior of said one ofsaid front wall portion and rear wall having smooth nonobstructiveconvex embossments over and enclosing said fasteners and blending withthe interior wall surfaces.
 26. An air nozzle adapted for blowing wateroff a washed vehicle in a car wash comprising a unit nozzle housing ofmolded plastic material having an arcuate top wall, laterally divergingside walls, a pair of laterally spaced mount blocks, a substantiallyupright rear wall, an upper front wall portion inclined downwardly andoutwardly of said rear wall, and a lower front wall portion inclineddownwardly and inwardly toward said rear wall, said walls and wallportions defining an air chamber of laterally increasing width from itstop and with said side walls, said lower front wall portion and rearwall defining a laterally elongated throated air outlet, a plurality ofspaced threaded insert fasteners molded, interlocked and non-rotativelyenclosed within said one of said front wall and rear wall and each ofsaid mount blocks, said housing and insert fasteners being rotationallymolded with said fasteners permanently embedded and enclosed within saidone of said upper front wall and rear wall, and within said mountblocks, the interior of said one of said front wall portion and rearwall, and said mount blocks having smooth nonobstructive convexembossments over and enclosing said fasteners and blending with theinterior wall surfaces.
 27. In the air nozzle of 25, the corners betweenadjacent walls and wall portions being internally radiused, eliminatingsharp corners within said air chamber for the maximum smooth nonobstructed, non turbulent, substantially noiseless air flow through saidthroated outlet.
 28. An air nozzle adapted for blowing water off awashed vehicle in a car wash comprising a unit nozzle housing of moldedplastic material having a top wall, laterally diverging side walls, asubstantially upright rear wall, an upper front wall portion inclineddownwardly and outwardly of said rear wall, a lower front wall portioninclined downwardly and inwardly toward said rear wall, said walls andwall portions defining an air chamber of laterally increasing width fromits top and with said side walls, said lower front wall portion and rearwall defining a laterally elongated throated air outlet, and anelongated flexible air flap extending along, secured to and dependingfrom one side of said nozzle housing adjacent said throated outlet,adapted for directing pressurized air in a direction opposite thedirection of movement of a vehicle thereunder.
 29. In the air nozzle ofclaim 28, said air flap depending from said rear wall.
 30. In the airnozzle of claim 28, the securing of said air flap including a series oflaterally spaced spacers extending between said rear wall and lowerfront wall portion at said throated outlet; anda plurality of fastenersextending through said air flap spacers, said rear wall and lower frontwall portion and secured thereto.
 31. An air nozzle adapted for blowingoff water off a washed vehicle in a car wash comprising a unit nozzlehousing of molded plastic material having an arcuate top wall, laterallydiverging side walls, a pair of laterally spaced mount blocks, asubstantially upright rear wall, an upper front wall portion inclineddownwardly and outwardly of said rear wall, a lower front wall portioninclined downwardly and inwardly toward said rear wall, said walls andwall portions defining an air chamber of laterally increasing width fromits top and with said side walls, said lower front wall portion and rearwall defining a laterally elongated normally closed throated air outlet;andan outwardly and laterally inclined downwardly converging hood uponeach side wall communicating with said air chamber and terminating in anormally closed air outlet orifice, said outlet and orifices adapted tohave laterally elongated outlet openings cut therein, said orificesadapted for directing pressurized air laterally outward of said throatedoutlet for blowing water off the edges of a wider vehicle.
 32. An airnozzle comprising a unit nozzle housing of molded plastic materialhaving a top wall, a pair of side walls, a pair of front and rear walls,said walls defining an air chamber having adjacent the bottom thereof alaterally elongated throated air outlet, one of said front and rearwalls having an air inlet opening therein and a plurality of spacedthreaded insert fasteners arranged in a circle molded, interlocked andnon-rotatively enclosed within one of said front and rear walls.
 33. Theair nozzle defined in claim 32, including a pair of laterally spacedmount blocks located on said side walls adjacent said top wall, and aplurality of spaced threaded insert fasteners arranged in a row molded,interlocked and non-rotatively enclosed within each of said mountblocks.
 34. The air nozzle defined in claim 32, including an outwardlyand laterally inclined downwardly converging hood upon each side wallcommunicating with said air chamber and terminating in an air outletorifice for directing air laterally outward of said throated outlet. 35.The air nozzle defined in claim 32, said housing and insert fastenersbeing rotationally molded with said fasteners permanently embedded andenclosed within one of said front wall and rear wall, and anchoredagainst relative longitudinal and rotational movements.
 36. The airnozzle defined in claim 32, said insert fasteners being polygonal inshape, and having an annular groove intermediate their ends to receiveplastic material to provide an interlock with said housing againstrelative longitudinal and rotative movement.
 37. The air nozzle definedin claim 33, said housing and insert fasteners being rotationally moldedwith said fasteners permanently embedded and enclosed within said one ofsaid front wall and rear wall, and within said mount blocks, theinterior of said one of said front wall and rear wall, and said mountblocks having smooth nonobstructive convex embossments over andenclosing said fasteners and blending with the interior wall surfaces.38. In the air nozzle of claim 6, said nozzle housing having a wallthickness of 3/8", approximately.